Sleipnir for Windows vulnerable to address bar spoofing


Sleipnir for Windows contains an issue in displaying colors and the padlock icon on the address bar, which may result in the address bar being spoofed.

Keita Haga of keitahaga.com reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
CVSS Severity (What is CVSS?)

CVSS V2 Severity:
Base Metrics 4.3 (Medium) [IPA Score]
  • Access Vector: Network
  • Access Complexity: Medium
  • Authentication: None
  • Confidentiality Impact: None
  • Integrity Impact: Partial
  • Availability Impact: None
Affected Products

Fenrir Inc.
  • Sleipnir 4 for Windows and earlier


A user may misinterpret that the website is using the SSL for communications even when the site is not using SSL.

[Update the software]
Update to the latest version according to the information provided by the developer.
Vendor Information

Fenrir Inc.
CWE (What is CWE?)

  1. No Mapping(CWE-noinfo) [IPA Evaluation]
CVE (What is CVE?)

  1. CVE-2013-2303

  1. JVN : JVN#65034198
  2. National Vulnerability Database (NVD) : CVE-2013-2303
Revision History

  • [2013/04/11]
      Web page was published